Watch the 4:19 minute TED-Ed video on What Happens to Your Body...

Watch the 4:19 minute TED-Ed video on What Happens to Your Body When You Start Exercising Regularly https://ed.ted.com/best_of_web/WaARd3SV . then watch the 2:10 minute video on Tech Insider on What Happens to Your Body When You Stop Exercising https://www.youtube.com/watch?v=hQz_V9Dr8IU.

Describe one specific thing you find most interesting from the video about what happens when you start exercising and why you find it interesting. 
Describe the one specific thing you find most interesting from the second video--what happens when you stop exercising-and what you find interesting.
State one concept from unit 10 in the textbook that you find most interesting, and you will be able to use this information in your personal physical fitness efforts.